﻿#region license
// Copyright (c) 2007-2010 Mauricio Scheffer
// 
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// 
//      http://www.apache.org/licenses/LICENSE-2.0
//  
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#endregion

namespace SampleSolrApp.Helpers {
    public static class StringHelper {
        public static int TryParse(string u, int defaultValue) {
            try {
                return int.Parse(u);
            } catch {
                return defaultValue;
            }
        }

        public static int TryParse(string u) {
            return TryParse(u, 0);
        }

        /// <summary>
        /// Like null coalescing operator (??) but including empty strings
        /// </summary>
        /// <param name="a"></param>
        /// <param name="b"></param>
        /// <returns></returns>
        public static string IfNullOrEmpty(string a, string b) {
            return string.IsNullOrEmpty(a) ? b : a;
        }

        /// <summary>
        /// If <paramref name="a"/> is empty, returns null
        /// </summary>
        /// <param name="a"></param>
        /// <returns></returns>
        public static string EmptyToNull(string a) {
            return string.IsNullOrEmpty(a) ? null : a;
        }
    }
}